@dailyhowthingswork: Flower colors come from pigments in their petals. Anthocyanins produce many red, pink, purple, and blue shades, while carotenoids contribute yellows and oranges. Flowers described as black usually have deep purple or burgundy petals that appear almost black. Color can also vary with the variety, growing conditions, and stage of bloom. This visual guide groups flowers by color to help you learn their names and recognize different varieties.